Oil temperature regulating device



May 23, 1939. F. M. YOUNG Er Al.

Fig. /NVENTo/Q May 23, 1939. F.I M. YOUNG ET AL 2,159,468

' OIL TEMPERATURE REGULATING DEVICE l Filed Nov. '7, 1936 3 Sheets-Sheet? n3 4 Fig. i

/NI/EN TOR Fred M. You/2Q 3 Sheets-Sheet 3 -May 23, 1939. F. M. YOUNG Er Al.

I OIL TEMPERATURE RE'GULATING DEVICE Filed Nov. 7, 195e Patented May 23, 1939 OIL TMPEBATURE REGULATING DEVICE Fred M. Young and Ernst wlmi, meine, wa., assignors to Young Radiator Company, Racine, Wis., a corporation of Wisconsin Application November 7, 1936, Serial No. 109,716

s claims.

Our invention relates to means for cooling the lubricating oill of internal combustion' engines, particularly those used on airplanes wherein the engine is subjected to various atmospheric tem- 6 peratures and wherein the lubricating o ll is thermally sensitive.

The object ci' our invention is to first permit the lubricating oil temperature to rise quickly and to a predetermined point after which a furlA ther rise in temperature is prevented by a cooperative action of a spring controlled by-pass valve and a heat transfer device operatively connected thereto.

When the present invention is applied to an airplane engine the device is positioned in the direction `of travel and having the oil inlet in the rear of this device and the oil outletin front or 'opposite to the air flow. Another object of the present invention is touprovide means whereby round tubes may be closely nested in the housing, and to provide suitable headers and a suitable means for bonding the tubes to the header.

A further object is to increase the air flow through the'tubes by flaring the protruding tube `ends and stopping the tube ends short of the housing end thus to form a retaining flange around the tube bundles at their ends.

Important objects of our invention are to closely space the tubes and provide a number of baffle partitions through which the tubes extend and are closely embraced'thereby the partitions having alternately spaced `openings; whereby the oil is forced between the tubes of the bundle transversely, thus to increase the length of travel and cause the oil to closely implnge the surface of the tubes.

To these and other useful ends ourk invention consists of parts or combinations thereof'or their equivalents as hereinafter set forth and claimed w'and shown in the accompanying drawings in which:

Fig. 1 is a top view of our complete device. Fig. 2 is a side elevation of the device as shown in Figure l having a section cut-away so as to 55 expose fractions of two baille plates. a section through the tube plate and a portion of some of the tubes.

Fig. 3 is a rear elevation of the device as shown in Figures 1 and 2.

Fig. 4 is an enlarged end view of three tubes 5 and a fraction of the header.

Fig. 5 is a sectional View taken on line 5 5 of Figure 4.

Fig. 6 is an enlarged transverse section taken on line 6 6 of Figure 2. 10

Fig. 7 is an enlarged transverse section taken on line 1-1 of Figure 2. y

As thus illustrated the shell or housing of the device is designated by numeral I0, this member being preferably made round in cross section, as l5 illustratedin Figure 3. We provide preferably vtwo longitudinal walls il and i2 (see dotted lines in Figure 3). 'I'hese walls are centrally positioned in the shell and spaced apart about as illustrated. We provide preferably two bundles of round .o tubes i3, these bundles being designated in their entireties by reference characters A and B. Bundle A is positioned in the space formed by partition Il, and bundle B is positioned in the space formed by partition I2. Tubes Il are preferably 25 round in cross section and closely spaced and occupy practically all of the space formed by members III, Ii and l2.

We provide preferably two pairs of header plates I4 and II through which the ends of the 30 tubes extend, the ends protruding slightly as illustrated in Figure 5. A thin sheet I6, preferably of copper is placed between header plates Il and I5, the tubes protruding through openings in these copper plates as in the header plat. 35 When the tubes are assembled and the headers placed into position as illustrated fractionally in Figure 3, heatis applied to the tube plates, drum and tube ends, of suiilcient temperature to melt the copper sheet I6 which will flow aroundi the 40 tubes and between the h aders and provide a liquid and gas tight joint l tween the headers and housing and between the headers and tube ends.

The edges of members I I and I2 are bent at right angles forming flanges. The flanges of member I2 are spaced suitable for the reception of the flanges on member Il. 'Ihus when assembledas illustrated in Figure 3, a chamber 2l is formed. The flanges are bonded together and the entire assembly is bonded to member' Il and 50 to the inside header plates.

Devices of the class are frequently subjected to considerable pressure causing a leak to the atmosphere which is a serious matter in airplane service; therefore, abondlng material such as copper g5 than ordinary solder formerly used in devices of the class.

After the tube plates have been secured to the tubes by bonding as described, the tube ends are `then flared outwardly as at 2| (see Figure 5) thus to enlarge the opening in the tube ends and reduce the dead space between the saine.l 'I'he tube ends stop short of the end of housing I thus providing a forwardly projecting flange forming a pocket 22 thereby to assist in directing the air into the tubes as indicated by arrows, it being understood that C designates the front end of the device.

We provide preferably a bracket I9 which is securely bonded to the top of housing I0, as illustrated, and having an inlet opening 25 which registers with an opening in the housing and chamber 20-as at 26 (see Figures 1 and 2). Bracket lI9 provides a base for the controlling valve which in its entirety is designated by reference character E including its forwardly extending outlet portion.

Member I9 is made flat on its outer surface and member E registers with this iiat surface a gasket 2'I being positioned therebetween and the joint made oil tight by means of bolts 26.

Member I9 is provided with a chamber 29 having an inlet opening 39 which extends through the housing and into chamber 20, and an outlet opening 3|. Bracket I9 is also provided with a chamber 32 having an outlet 33 and inlet openings 34 and 35 forming a connection to the front ends of the tube chambers.

Valve E comprises a housing 40 havinga valve seat opening 4I which registers with outlet 31|. We provide a valve cap 42 which is screw threaded into chamber 40 and is provided with a sleeve 43. A valve 44 is provided with a stem 45 which ii'ts freely into sleeve 43. Spring 46 is adapted tohold the valve on its seat up to a predetermined pressure which will hereinafter be referred to. Member E is'provided with a forwardly extending portion 41 having an outlet 48 which extends into the valve chamber formed by housing 40. Outlet 33 intersects outlet 48 as indicated in Figure 7.

We provide a transverse baille 50 in chamber 20' which terminates preferably as at I 'whereby when valve 44 is lifted from its seat, oil may enter inlet 25, pass around baille 50 at 5I then passing upward and through the valve and out at 48. This is the route taken by the oil when the resistance is too great for it to pass between the tubes of the tube bundle. During this time the heated oil will warm the oil in the tube chambers up to a point where valve 44 will be seated and the oil will then be forced to pass into the front end of the tube chambers through openings 52 which are positioned in the rear ends of partitions I I and I2 as indicated by dotted lines in Figure 2.'

We provide transverse baille plates 53 and 54 through which the tubes extend and are closely embraced thereby, baille plates 53 terminating as at 55 and baille plates 54 as at 56 whereby the oil will pass between the tubes sinuously from inlets v52 to outlets 34 and 35 as indicated by arrows in Figure 2.

It will be understood that bailles 53 and 54 may ll the entire space in the housing and have alternately positioned openings which will cause the oil to flow exactly as indicated by arrows.

'I'hus it will be seen that our device is simple, strong and eiiicient, that the valve will operate `to permit the oil temperature to rise quickly and further rise will be effectively prevented after the valve has closed and that the device operates on the counter iiow principle thus to provide mini-1 mum size and cost.

Clearly minor detail changes may be made without departing from the spirit of the invention as ,A spaced partition walls and two header plates,

bundles of tubes in said side chambers the ends protruding through said header plates and being vbonded thereto, a spring held relief valve forming an outlet to said passageway, an inlet connection to said passageway near the rear end thereof, openings to said chambers in said partitions near the rear ends thereof and outlets in the other ends of said chambers, spaced transverse partitions in said chambers through which said tubes extend and having alternately positioned openings, whereby whensaid valve is closed the oil will pass between the tubes of said bundles sinuously and whereby when the oil cannot pass between the tubes, said valve will lift and theoil pass through said passageway.

2. An oil. cooling and temperatureregulating device of the class described, comprising a housing having a narrow medial passageway and chambers on opposite sides thereof formed by two spaced partition walls and two header plates, bundles of tubes in said chambers the ends protruding through and bonded to said header plates but stopping short of the ends of said housing, the protruding ends being flared outwardly, a spring held relief valve forming an outlet to said passageway, an inlet connection to said passageway near the rear end thereof, openings to said chambers in said partitions near the rear ends thereof, outlets in the other ends of said chambers, spaced transverse partitions in said chambers through which said tubes extend and having alternately positioned openings whereby when said valve is` closed, the oil will pass between the tubes of said bundles sinuously and whereby when the oil will not pass between the tubes said valve will lift and the oil pass through `Isaid passageway.

3. An oil cooling and temperature regulating device of the class described, comprising a housing having a medial passageway and chambers on opposite sides thereof formed by two spaced parti- 5 5 tion walls and two header plates, bundles of tubes in said chambers the ends protruding through and bonded to said headers, a spring held relief valve forming an outlet to said passageway, an inlet connection to said passageway near the rear end thereof, openings to said chambers in said partitions near the rear ends thereof, outlets in the front ends of said chambers. a number of spaced transverse partitions in said chambers through which said tubes extend and having alternately positioned openings, whereby when saidvalve is closed, the oil will be forced to pass between the tubes of said bundles sinuously from the rear to the front thereof and whereby when the oil cannot pass between the tubes of said bundles, said valve will lift and the oil be permitted to pass through said passageway.

4. An oil cooling device of the class described. comprising a housing having a bundle of tubes therein and headers through which said tubes extend forming a core being adapted to be cooled by forcing air through said tubes from iront to rear, a low pressure passageway in heat exchange contact with said core having a spring held relief valve outlet, a common inlet at the rear end of said passageway and core, and a common outlet for said valve and the front end of said core, a number of spaced transverse partition walls in said vhousing through which said tubes extend and having alternate openings, whereby oil will pass from said inlet to said outlet between the tubes of said core sinuously when said valve is closed rand in counter heat transfer contact with the air passing through said tubes, and whereby when the oil cannot pass between said tubes, said valve will open and the oil will then pass directly through said passageway and valve.

5. An oil cooling device of the class described, comprising a housing having a bundle of tubes therein and headers through which said tubes extend, forming a core being adapted to be exposed on an airplane whereby air will be forced through said tubes by frontal pressure, a low pressure. passageway in heat exchange contact with said core, having a relief valve outlet, a common inlet at the rear end of said passageway and core, and a common outlet'for said valve and the front end of said core, a number of spaced transverse partition walls in said housing through `open and the oil then pass directly through said passageway.

FRED M. YOUNG. ERNST WITZEIi. 

